Foliar Nutrients and Their Resorption Efficiencies in Four Pinus sylvestris var. mongolica Plantations of Different Ages on Sandy Soil RESPONESE OF SABINA VULGARIS TO NUTRIENT RESOURCES IN THE CONTRASTING HABITATS IN THE MU US SANDLAND Effects of N addition on nutrient resorption efficiency and C:N:P stoichiometric characteristics in Stipa bungeana of steppe grasslands in the Loess Plateau, China Seasonal dynamics of nitrogen and phosphorus concentrations, and nutrient resorption efficiencies of Casuarina equisetifolia branchlets in Dongshan County, Fujian Leaf traits and nutrient resorption of major woody species in the karst limestone area of Chongqing Leaf nitrogen resorption efficiency of Stipa purpurea and its determinants along a precipitation gradient on the Changtang Plateau Foliar nutrient content and resorption efficiency of Pinus massoniana in the subtropical red soil erosion region Seasonal dynamics and resorption efficiencies of foliar nutrients in three dominant woody plants that grow at the treeline on Changbai Mountain Nutrient dynamics in Quercus mongolica leaves at different canopy positions.